Portable cableway



Dec. 16, 1930. J. H. DICKINSON ETAL 1,785,340

PORTABLE 'CABLEWAY Filed'O'ct. 3, 1929 4 Sheets-Sheet l INVENTO RS 1 T'TORNEYS Dec. 16, 1930. J. H. DICKINSYON ET AL 1,735,340

PORTABLE CABLEWAY Filed-Oct. 3. 1929 4 Sheets-Sheet 2 BY y. $50M Dec. 16, 1930. J. H. DICKINSON ET AL 1,785,340

PORTABLE CABLEWAY Filed 001;. 3,. 1929 4 Sheets-Sheet 3 WATTORNEYfi INIEN TORfS M fim 'Dec. 16, 1930. J. H. DICKINSON ET AL I 1,735,340

PORTABLE CABLEWAY Filed Oct; 3, 1929 4 Sheet3-Sheet 4 Patented Dec; 1 1930 j i OsEPH H.DIcKIiisomoFwnvTnRraaimnonrim;nunimnam ifii m g-K met v e sEA'rTLmWAs INGTO AssIGN RSmomnennwoonm munaomun lvecompany,

,7 j 01 ELIZABETH, NEw ERs g A- coaPoRA'r onon NEWYQB-K l w li'io' i L eBife e -ei"f. i i I i kpizlication filed October; 3, 1929;

our present invention relates'to; improved 7 portablelcableways and has particular ape especially forlogging operations. a a It has h 'ret fore been proposed-to wind a plication to an apparatus of the'type adapted main cable on a drum of a logging engine; 7 the' drumitakingfthe tensionwhen a load is being brought in oventhe maincable. Such constructions,- however, have requ red large and-heavy spars. p

' It has also been p'roposed to useheelblock anchorages which are connected to the top of the spai'fas the use of such anchorages per; units the use ota' smaller spar than where the cable wound directly on the drum, the drum taking the tension when the cableway is loaded and being operated,{for reasons which will more fully hereinafter appear! Heretojforey where heel block anchoragesforthe main spar have beenused, it hasbeen customaryto use two main cables, and while 1 one of them-iscOnnected to themain spar and being used for bringing, logs, the other is brought to a position:,for-the n'extrun of logs. I 3 Such an operation requires a consider able amount of t me and annoyance especi-a ally mountainous.countrywhere the: spans diagram illustrating the advantagesof (our 1 invention as compared to, a-system in which are of extreme and variablelengths a Our invention combines the advantages of a drum on which themaincable-is wound and heel block-anchorages which permit the use of a relatively small spar, A further advan-" tage in our present invention resides in the fact that the free'end ofthe cable-may be brought to a desired position in the woods,

Whereas with a two cableway system,tliere spans'are of different lengths.

vOur invention will 'best be understood by a reference to the accompanying'drawings,i -which Fig. 1 is aplan view ofacabjleway",

system embodying our invention; Fig. 2 1s side viewthereof; Fig. 3is a' plan view of the logging engine; Fig.4 is anenlarged detailed view of the top portion of the spar and'associatedparts,- and Fig, 5 isa graphic the main cable is wound upon a: drum i'which j ecti ie serial at; 39 may takes the stress ofthe inziin cable -wheh:in use. 3

' Like referenceq: characters indicate like) partsthroughout thedrawings. l

*Referring now were drawingsg A; indicates 1 generally a logging engine 'comprlsing adruni 10011 which is wound a main cableIOL A1;

spar ll is mounted 0111 a car-*platfornrm which also carries the log-skidding engine. In F iggQ, the platform is shown supported by suitable legs 13' whichiare intended :to; straddle track rails .(not illustrated); in' the v usual way; v

' Thejlog-skidding engine also. comprises f usual"skiddingrdruni 14,.outhaul-1drum 15,

slack-pulling drum 16; andusually the: trans.

is -indicated at 26 and-is.adapted'itotraverse the inain cable 101. -Tlie skidding 'linev18 c passes over block 27fattachedto thecar- .1 riage 26rand is provided at itsifree endwith tongs 2 8Jor devic'e;for attaching tlie same f tor'avlog iorFlogs or other-loads The outhaul line 19 :is attachedvto; the" carriage Quin the 1 }usual manner and the slack-pulling:line:T20 is attached to the skiddinglineias at29l i f In accordance withck'ourwinvention, means fer-drum 'l-fZo'n which are wound thefskidding I 1 line 18,;duthaul line l9.-, slackfpullingt line 120 P and :transfer ":line 21; respectively? passing 7: over blocks 22, 23," 2& andv25,all-mounted on thespar 11. 'A' carriageof usualconstruction are providedxfor attachin'g the niain; cables tothe spar'and thereby: relieving. the ten'sion onithedrum onlwhich it is wound, thetdrum j thus se'rvingas a'storage drumiforthemain, cable. "Such clamp is best shown in Figsgf 15 and 4 ati30 and preferablyponiprises two spaced 'plates 301' and; 302 secured together I clampfthe main cable, "The concave surface 1 ,Mea'nsare' pr0vided,for attaching the also comprises a block 35 gattached to tlieftop clampin device *30fito jthe spar auditor sub "airi cable to any desired 'tensionif ment :-illustr;ated, a; block and iidicated "genera'lly at satcbm-fi prises'a block 33 connected to the clamp 31 by-a connectioniil'." Theblock andfall outfit of Such Plates which gi'iprthe cable are pref-'7 -erablyformed to fit the layithere'ofl I cated generally'at 36, and comprising, in the embodiment illustrated, a (split.v ring 37, a

shackle 38 being connected at one end tothe split ring 37 and at the other end to the blocks 44-and the heel blocks orblock and. 7 fall 32 may be reversed and thatithemain cable may be connected-to theheel blocks 44, the guys 43-.then: bein'gconnected tothe l *Headfspar guys-45, .here illustrated as *f0uryin number, are connected block 35. The rope 39 for the'block andrfall outfitipasses ovr'a block-or sheave 40 c on nected to vthe spar, as at 41, and is wound upon a heel block drum42. r p

Suitablemain-cable anchor, guys 48 are j d'provided', which, as shown,are connected-to the spar by heel blocks-indicated generally at 44. It will be understood that the heel ;Referring now to thegraphicwdiagram in connected to:the spar. Thedrum on "which the main cable is wound isnecessarily lo-' cated comparatively near the base of the spar. '.;We have indicated at 46 on the main 7 Fig. .5, we have shown a comparison between the stresses and strains to which the spar is subjected when the main cable is, wound upon the main cable drum, which drum is subjected to the tension of the main cable, and

the arrangement where I heel anchorages are cable, a distance representingia force which may be, for example,20 ,000 lbs., The same force,:of course, is exerted on the cable be,-v tween the spar and ctherzdrum on which the main cable is wound andthe same distance,

46*, representsthe sametension in the cable.-'- The'xresultantiot :the parallelogram Y of.

forces of'46 and 46 is represented at 47, and

theverticallcomponent of this resultant force 1 in thelsp'ar is indicated at 48,;Natura1lythe' horizontal stress is: taken up; by the, main cable anchor guys 43; I ;Nowlwhennthemaincable-;drum.serves only 7 V as a storage drum forthe main cable, the tenj sion-being taken up-by aconnectionbetwe'en V the clamping device. on the mainccable and 7 the spar, and the heel anchorages 48which are. located on -the opposite side of the spar from the main'cablean'di-which arefarther v remove'dvfrom-the basetof' thespar'than the 7 main'cable drum can be in practice, as illus-o 1 trated in Fig. 5, theniwhen the main cable is) subjected. to the same tension 'as-assumed in,

connection with theffir st, case, the" same dis-I tance 46' thereon Q represents the same I' force as previously and when the same distance 46? is laid oil on the guy 43"which is -.located opposite the main'cable andtakes up thetension r v therein, it will beiseen thattthe resultant is at 49;and the vertical component thereof inthe only to store cable.

maincable. g v g ,7

' JOSEPHI-IiDICKINSONk 0nd casethan in the first and the spar can,

therefore, be made very much lighter and cheaper than in the first case.

In the embodiment illustrated, we have shown a 'boom- 51 of usual construction, mounted 17 a platform 52 which 15,1 1 turn, mounted onthe car platform 12 and is rotatablethereon in the usual way. As this boom and-the associated partsmay be of usualf'construction and the same constitutes no part of our invention; the {details thereof need not further be described. V g 1 fWe claim: 7 v I I 1. In combinat on, an engine comprising a V drum", a spar, a main cable wound upon said drum, a clamp adapted ,to grip said cable, and means for connecting saidclamp to said spar, saidc di'um then servingi merely to store 2. In combination, an; engine comprising a drumsa' spar, aimaincable wound upon said vdrum, a clamp adapted to grip said cable,

block and, fall" means for connecting said clamp to saldspar, said drum then serying' In combination, a ,log-skidding engi-ne comprising adrum, a; spar, a main, cable, wound upon said drum, a clamp, adapted to grip said cable,"an'd-means for connecting' said'clamp to said spfar; v v 4. lnfcombinatiomla log-skiddlng engine comprlsing a drum,'}a' "spar, a mam cable wound'uponf'said drum, a clamp adapted to grip saidvcable','n ieans for clamping said cable to said spar, and heel anchorages attached to said s said main cable.

' 5."In combination, a log-skidding engine comprising a drum, a main'cablewound'upon said drum, a spar, clamp a'daptedto grip said cable,meansforconnecting said clamp to said spar, and connecting means between par forlresisting' the strain exerted by said, clamp and said spah for tightening the IIM F H P Q WQ V spar at 50, '4 In the latter. case, itwill be seen, f I i i 

